The song does imply an atheist aesthetic, but I would imagine John was coming out of the Beatles experience quite disenchanted and being with Yoko might've given him some sense of normalcy. The lyrics to me represent a clear escape into his own art and new found love, that some were using as the reason everything fell apart. Grounds for propaganda and debate and to this day is a great conversation piece.

a piece of personal genius........mindless semi humans run here and there bowing to this and that, all the while lost in their TV shows, trivila puruits, and inane superficial conversations...open your minds